Department of Oral Cell Biology, Academic Center for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
Department of Second Dental Center, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, No. 280, Mohe Road, Baoshan District, Shanghai, 201900, China.
Int J Implant Dent. 2023 Mar 27;9(1):9. doi: 10.1186/s40729-023-00472-4.
The study aims to use cone beam computed tomography (CBCT) to (1) define the virtual valid length of pterygoid implants in maxillary atrophic patients from the prosthetic prioritized driven position and (2) measure the implant length engaged in the pterygoid process according to the HU difference of the pterygoid maxillary junction.
Virtual pterygoid implants were planned with CBCT of maxillary atrophic patients in the software. The entry and angulation of the implant were planned according to the prosthetic prioritized driven position in the 3D reconstruction image. The planned implant length and the valid length defined as the implant between the pterygoid maxillary junction and pterygoid fossa were recorded. The relationship between the implant and sinus cavity was also evaluated.
A total of 120 CBCT samples were enrolled and virtually planned. The mean age of the patients was 56.2 ± 13.2 years. One hundred and sixteen samples could successfully place virtual implants according to the criterion. The mean implant length and mean implant length beyond the pterygoid maxillary junction were 16.3 ± 4.2 mm (range, 11.5-18 mm) and 7.1 ± 3.3 mm (range, 1.5-11.4 mm), respectively. Ninety percent of virtually planned implants had a close relationship with the sinus cavity, and implants exhibited longer lengths when they had no relation with the sinus.
From a prosthetic prioritized driven position with fixed entry and angulation, pterygoid implants achieve adequate bone anchorage length beyond the pterygoid maxillary junction. Due to the individual anatomy and the volume of the maxillary sinus, the implants presented a different positional relationship with the maxillary sinus.
本研究旨在使用锥形束 CT（CBCT）：(1) 从修复优先驱动位置定义上颌骨萎缩患者翼状突植入物的虚拟有效长度；(2) 根据翼上颌结合部的 HU 差异测量植入物在翼状突内的长度。
对上颌骨萎缩患者的 CBCT 进行三维重建，在软件中规划虚拟翼状突植入物。根据 3D 重建图像中的修复优先驱动位置规划植入物的进入角度。记录计划植入物长度和定义为翼上颌结合部与翼状突窝之间的植入物有效长度。还评估了植入物与窦腔的关系。
共纳入 120 例 CBCT 样本进行虚拟规划。患者的平均年龄为 56.2±13.2 岁。根据标准，116 例样本能够成功放置虚拟植入物。平均植入物长度和平均超过翼上颌结合部的植入物长度分别为 16.3±4.2mm（范围 11.5-18mm）和 7.1±3.3mm（范围 1.5-11.4mm）。90%的虚拟规划植入物与窦腔密切相关，当植入物与窦腔无关系时，植入物长度更长。
从固定进入角度和角度的修复优先驱动位置，翼状突植入物可获得超过翼上颌结合部的足够骨锚固长度。由于个体解剖结构和上颌窦体积的不同，植入物与上颌窦的位置关系也不同。
